numberp (ANSI and GNU Common Lisp Document)

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#### 12.2.44 numberp [Function]

`numberp` object ⇒ generalized-boolean

#### Arguments and Values::

object—an object.

generalized-boolean—a generalized boolean.

#### Description::

Returns true if object is of type number; otherwise, returns false.

#### Examples::

     (numberp 12) ⇒  true
     (numberp (expt 2 130)) ⇒  true
     (numberp #c(5/3 7.2)) ⇒  true
     (numberp nil) ⇒  false
     (numberp (cons 1 2)) ⇒  false

#### Notes::

     (numberp object) ≡ (typep object 'number)